Search results

The electrohydraulic control system replaces the traditional mechanism driven by the mechanical cam to simplify the engine’s design, reduce the cost, and optimize the operating control.
The consistency of the theoretical analyses and the experimental results is the key factors affecting the components’ design.
Combined with the fatigue reliability theory, the fatigue life and safety factor of the body can be evaluated quantitatively.
Thermal and Mechanical Fatigue Analysis for Cylinder Head-Piston The cylinder head-piston in the diesel engine’s working process, not only bears the mechanical load caused by the explosion pressure, but also the alternating heat load caused by the by the combustion.
The stress distribution and high-cycle fatigue characteristics of the cylinder head and piston are studied under the joint action of the mechanical and thermal loads.

The great effort needed to identify their causes and a lack of disturbance descriptions have been discovered as factors jeopardising efficient disturbance management measures [3].
The benefit of distinguishing by different types of order processing is that it already encompasses many properties characterising a specific shop floor such as the ratio of delivery time vs. lead time, the amount of parts produced per unit of time or the number of variants [9: 48].
Causal factor chart.
A newly developed causal factor chart illustrates the qualitative interdependencies of the shop floor's target variables, thus helping users to assess how their specific disturbances affect the target variables of the production system.
Nyhuis, A Universal Approach to Categorize Failures in Production, International Journal of Mechanical, Industrial Science and Engineering, Vol:8, No:02 (2014) 4-6

Wear resistance is a structural-sensitive characteristic and depends on the size, shape, distribution and volume fraction of the solid phase, as well as on the mechanical properties of the solid and matrix phases.
Structural changes and related changes in mechanical properties, as well as surface roughness, affect the wear processes of steels [5, 6].
Changes in the relative wear resistance (a) and mass loss (b) of 18HN3MA-SH steel, depending on the exposure time of the EPA during experimentation of 10 and 20 minutes Abrasive wear is a complex process due to the influence of numerous factors on it, the main of which are the mechanical properties of the surface and abrasive, the normal load on the contact, the size and shape of abrasive particles, the speed of relative movement [13].
Summary Thus, it has been found that the main factors influencing the quality of the surface layer of steels during electrolytic-plasma processing are: heating temperature and holding time.
Change of structure and mechanical properties of R6M5 steel surface layer at electrolytic-plasma nitriding, Advanced Materials Research, 1040 (2014) 753-758 [7] Yunlong Wang, Zhaohua Jiang, Zhongping Yao.

In recent years, people have improved the surface properties of cobalt based alloy through surface modification technology, which effectively improved the clinical effect.
Niobium, tantalum, zirconium and titanium have similar organizational structures and chemical properties[9].
In the machinery industry, the surface morphology of the mechanical parts not only has a great influence on the mechanical properties of the mechanical system, which conclude the friction wear, contact stiffness, and the transmission precision, but also has a close relationship with thermal conductivity, electrical conductivity, corrosion resistance and other physical properties, which affects the mechanical and instrument precision, reliability, vibration resistance and service life.
The surface quality of mechanical parts is an important factor in its functional properties.
The surface topography greatly influences the contact surface friction and wear, lubrication, sealing, corrosion resistance, thermal conductivity, anti-fatigue and other functional properties.

Affected by geological structure, topography, stratum conditions and other factors, ground fissure disasters are well developed.
Obviously, the causes of ground fissures have both internal factors and external factors, both of which have a certain coupling relation [5].
Its strata is mainly composed of loess or loess-like soil, clay and other hard or hard plastic layer, with high strength, low deformation and mechanical properties.
Due to the mechanical characteristics of loess structural joints, when base fracture occurred, it is easy to make such strata creep deformation of dislocation occur, and reflects on the surface as the form of ground fissure [8].

And the forming process involves energy parameters, material properties and forming parameters, so the analytical model is reliable due to many assumptions to simplify the model.
The thermal physical properties of AISI 5150H steel are given in Table 1.
So parameters influencing on heated affect and parameters related to production time are investigated respectively by using the simplified model.
During this forming, two main factors contribute to the imprecision of workpieces: elastic springback and unwanted deformation in areas surrounding the tool contact area, as a result of excessive stress levels.
Table 2 Parameter ranges used in the numerical simulation Forming parameter Min Max Rotational speed/n[r/min] 800 100 Feed rate/f[mm/r] 2 0.5 Laser power/P[kw] 3 1 Spot diameter/d[mm] 10 5 Summary A three numerical mold has been developed which includes coupled transient thermo-mechanical analysis accounting for the temperature dependency of the thermal and mechanical properties of material.

The factors that impact the performance of thermoacoustic conversion are the impedance characteristics of loudspeaker, standing-wave resonator and structure parameter of stack.
There are many factors influencing properties of thermoacoustic conversion, such as the material, length, pore diameter and wall thickness of stack, position of stack in sound filed and so on.
If the stack spacing is too large, an inevitable part of the area will not participate in the thermoacoustic heating, thus affecting the conversion efficiency of thermoacoustic.
As we can see from figure4 ,when the source frequency below 210 Hz, the temperature difference at both ends of stack will rise with the source frequency rises; When the source frequency was more than 210 Hz, the physical properties of the gas and the impedance characteristics of loudspeaker are all effect the working frequency.
Mechanical Fluid, 2009, 37(4): 79-81

Injection of PTX has been shown to influence the bone biomedical properties [11] and calcified mass [8] in a dose-dependent manner.
Oral gavage of PTX to osteopenic rabbits affects thebone mass, strength and mineral properties [12].
Due to its properties like biocompatibility, bioactivity and osteoconductivity, HAP has an important role in bone defect repair.
In vivo injection of PTX increases the mechanical stiffness of the bone through its anti-osteoporotic property [5].
All these evidence indicate the positive effects of systemic administration of PTX on bone formation in cooperation with the other osteogenic factors.

Understanding the factors which affect the contact process is a critical part of the analysis.
In all of the factors which affect the contact process, thermal effect due to the frictional heating is one of the most important aspects.
In Ref. [5], the effects of material properties, the coating thickness and frictional coefficient on the stress distribution are investigated and discussed.
Mesh Preparation and the Properties of Material The original profile of rough surface is shown in Fig.1.
The substrate material is steel, and the properties of materials are listed in Table 1.

The aim of the present study was to establish whether the production procedure of different polymeric and composite membranes affects their physicochemical properties.
Composite biomaterial synthesis with PLA and biocompatible and bioconnective ceramics, calcium hydroxyapatite (HAp), enabled designing of many properties of this biomaterial, foremost of the porosity and mechanical properties [11, 12].
Tensile strength measured at room temperature [19] is most frequently used as a measure of mechanical properties.
It is known that the polymer mechanical properties increase with increasing polymer molecular weight for a constant value of porosity.
Surface characteristics of hard polymers significantly influence their adhesive properties, wettability, permeability, corrosive properties and biocompatibility [23].